20.500.12556/RUL-153565 The colonization of an irradiated environment the case of microbial biofilm in a nuclear reactor The investigation of the microbial community change in the biofilm, growing on the walls of a containment tank of TRIGA nuclear reactor revealed a thriving community in an oligotrophic and heavy-metal-laden environment, periodically exposed to high pulses of ionizing radiation (IR). We observed a vertical IR resistance/tolerance stratification of microbial genera, with higher resistance and less diversity closer to the reactor core. One of the isolated Bacillus strains survived 15 kGy of combined gamma and proton radiation, which was surprising. It appears that there is a succession of genera that colonizes or re-colonizes new or IR-sterilized surfaces, led by Bacilli and/or Actinobacteria, upon which a photoautotrophic and diazotrophic community is established within a fortnight. The temporal progression of the biofilm community was evaluated also as a proxy for microbial response to radiological contamination events. This indicated there is a need for better dose-response models that could describe microbial response to contamination events. Overall, TRIGA nuclear reactor offers a unique insight into IR microbiology and provides useful means to study relevant microbial dose-thresholds during and after radiological contamination. microbial biofilm radiation microbiology research reactor ionizing radiation radioecology bacterial microbiome jedrska fizika poskusni reaktor biološki vzorci true false true Angleški jezik Slovenski jezik Članek v reviji 2024-01-16 08:32:54 2024-01-16 08:32:54 2024-09-30 16:37:26 0000-00-00 00:00:00 2024 0 0 Str. 108–121 no. 1 Vol. 100 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.1 1362-3095 10.1080/09553002.2023.2258206 168513795 The_colonization_of_an_irradiated_environment__the_case_of_microbial_biofilm_in_a_nuclear_reactor.pdf The_colonization_of_an_irradiated_environment__the_case_of_microbial_biofilm_in_a_nuclear_reactor.pdf 1 56C5253678A0140BECE94F36056D5012 21ce54b47bb7a35927b6d65e3bc0015b2762d6fd182a3c99b3ec6542af3042b2 d4000e2c-b441-11ee-9139-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=179636 https://www.tandfonline.com/doi/full/10.1080/09553002.2023.2258206 0 a6af581d-b441-11ee-9139-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=179635 Biotehniška fakulteta 0 0 0